%0 Journal Article %A Narukawa, Yasuo %A Torra, Vicenç %T Twofold integral and multi-step Choquet integral %J Kybernetika %D 2004 %P [39] %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_2004__40_1_a3/ %G en %F KYB_2004__40_1_a3